NetBSD/sys/arch/hpcmips/dev/tpcalib.c

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/* $NetBSD: tpcalib.c,v 1.3 2000/02/28 12:34:32 takemura Exp $ */
/*
* Copyright (c) 1999 Shin Takemura All rights reserved.
* Copyright (c) 1999 PocketBSD Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <dev/wscons/wsconsio.h>
#include <hpcmips/dev/tpcalibvar.h>
#define TPCALIBDEBUG
#ifdef TPCALIBDEBUG
int tpcalib_debug = 0;
#define DPRINTF(arg) if (tpcalib_debug) printf arg;
#else
#define DPRINTF(arg)
#endif
/* mra is defined in mra.c */
int mra_Y_AX1_BX2_C __P((int *y, int ys, int *x1, int x1s, int *x2, int x2s,
int n, int scale, int *a, int *b, int *c));
#define SCALE (1024*1024)
int
tpcalib_init(sc)
struct tpcalib_softc *sc;
{
tpcalib_reset(sc);
return (0);
}
void
tpcalib_reset(sc)
struct tpcalib_softc *sc;
{
/* This indicate 'raw mode'. No translation will be done. */
sc->sc_saved.samplelen = WSMOUSE_CALIBCOORDS_RESET;
}
void
tpcalib_trans(sc, rawx, rawy, x, y)
struct tpcalib_softc *sc;
int rawx, rawy;
int *x, *y;
{
if (sc->sc_saved.samplelen == WSMOUSE_CALIBCOORDS_RESET) {
/* This indicate 'raw mode'. No translation will be done. */
*x = rawx;
*y = rawy;
} else {
*x = (sc->sc_ax * rawx + sc->sc_bx * rawy) / SCALE + sc->sc_cx;
*y = (sc->sc_ay * rawx + sc->sc_by * rawy) / SCALE + sc->sc_cy;
if (*x < sc->sc_minx) *x = sc->sc_minx;
if (*y < sc->sc_miny) *y = sc->sc_miny;
if (sc->sc_maxx < *x)
*x = sc->sc_maxx;
if (sc->sc_maxy < *y)
*y = sc->sc_maxy;
}
}
int
tpcalib_ioctl(sc, cmd, data, flag, p)
struct tpcalib_softc *sc;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct wsmouse_calibcoords *d;
int s = sizeof(struct wsmouse_calibcoord);
d = (struct wsmouse_calibcoords *)data;
switch (cmd) {
case WSMOUSEIO_SCALIBCOORDS:
if (d->samplelen == WSMOUSE_CALIBCOORDS_RESET) {
tpcalib_reset(sc);
} else
if (mra_Y_AX1_BX2_C(&d->samples[0].x, s,
&d->samples[0].rawx, s,
&d->samples[0].rawy, s,
d->samplelen, SCALE,
&sc->sc_ax, &sc->sc_bx, &sc->sc_cx) ||
mra_Y_AX1_BX2_C(&d->samples[0].y, s,
&d->samples[0].rawx, s,
&d->samples[0].rawy, s,
d->samplelen, SCALE,
&sc->sc_ay, &sc->sc_by, &sc->sc_cy)) {
printf("tpcalib: MRA error");
tpcalib_reset(sc);
return (-1);
} else {
sc->sc_minx = d->minx;
sc->sc_maxx = d->maxx;
sc->sc_miny = d->miny;
sc->sc_maxy = d->maxy;
sc->sc_saved = *d;
DPRINTF(("tpcalib: Ax=%d Bx=%d Cx=%d\n",
sc->sc_ax, sc->sc_bx, sc->sc_cx));
DPRINTF(("tpcalib: Ay=%d By=%d Cy=%d\n",
sc->sc_ay, sc->sc_by, sc->sc_cy));
}
break;
case WSMOUSEIO_GCALIBCOORDS:
*d = sc->sc_saved;
break;
default:
return (-1);
}
return (0);
}